/*
 * Copyright (c) 2002-2013 Alibaba Group Holding Limited.
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.citrus.maven.eclipse.base.eclipse;

import java.io.File;

import com.alibaba.citrus.maven.eclipse.base.eclipse.writers.workspace.EclipseWorkspaceWriter;
import com.alibaba.citrus.maven.eclipse.base.ide.IdeUtils;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;

/**
 * Deletes the .project, .classpath, .wtpmodules files and .settings folder used by Eclipse.
 *
 * @goal clean
 */
public class EclipseCleanMojo
        extends AbstractMojo {

    /** Definition file for Eclipse Web Tools project. */
    private static final String FILE_DOT_WTPMODULES = ".wtpmodules"; //$NON-NLS-1$

    /** Classpath definition file for an Eclipse Java project. */
    private static final String FILE_DOT_CLASSPATH = ".classpath"; //$NON-NLS-1$

    /** Project definition file for an Eclipse Project. */
    private static final String FILE_DOT_PROJECT = ".project"; //$NON-NLS-1$

    /**
     * Packaging for the current project.
     *
     * @parameter expression="${project.packaging}"
     */
    private String packaging;

    /**
     * The root directory of the project
     *
     * @parameter expression="${basedir}"
     */
    private File basedir;

    /**
     * Skip the operation when true.
     *
     * @parameter expression="${eclipse.skip}" default-value="false"
     */
    private boolean skip;

    /**
     * additional generic configuration files for eclipse
     *
     * @parameter
     */
    private EclipseConfigFile[] additionalConfig;

    /** @see org.apache.maven.plugin.AbstractMojo#execute() */
    public void execute()
            throws MojoExecutionException {
        if (skip) {
            return;
        }

        if (Constants.PROJECT_PACKAGING_POM.equals(this.packaging)) {
            return;
        }

        delete(new File(basedir, FILE_DOT_PROJECT));
        delete(new File(basedir, FILE_DOT_CLASSPATH));
        delete(new File(basedir, FILE_DOT_WTPMODULES));

        File settingsDir = new File(basedir, EclipseWorkspaceWriter.DIR_DOT_SETTINGS);
        if (settingsDir.exists() && settingsDir.isDirectory() && settingsDir.list().length == 0) {
            delete(settingsDir);
        }

        if (additionalConfig != null) {
            for (int i = 0; i < additionalConfig.length; i++) {
                delete(new File(basedir, additionalConfig[i].getName()));
            }
        }

        cleanExtras();
    }

    protected void cleanExtras()
            throws MojoExecutionException {
        // extension point.
    }

    /**
     * Delete a file, handling log messages and exceptions
     *
     * @param f File to be deleted
     * @throws MojoExecutionException only if a file exists and can't be deleted
     */
    protected void delete(File f)
            throws MojoExecutionException {
        IdeUtils.delete(f, getLog());
    }

    /**
     * Getter for <code>basedir</code>.
     *
     * @return Returns the basedir.
     */
    public File getBasedir() {
        return this.basedir;
    }

    /**
     * Setter for <code>basedir</code>.
     *
     * @param basedir The basedir to set.
     */
    public void setBasedir(File basedir) {
        this.basedir = basedir;
    }

    /** @return the packaging */
    public String getPackaging() {
        return this.packaging;
    }

    /** @param packaging the packaging to set */
    public void setPackaging(String packaging) {
        this.packaging = packaging;
    }
}
